Document And Entity Information - shares	6 Months Ended
	Mar. 31, 2022	Apr. 22, 2022
Document Information [Line Items]
Entity Central Index Key	0001029744
Entity Registrant Name	SONIC FOUNDRY INC
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	000-30407
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	39-1783372
Entity Address, Address Line One	222 West Washington Ave
Entity Address, City or Town	Madison
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	53703
City Area Code	608
Local Phone Number	443-1600
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	SOFO
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,826,566